A water aspirator or mechanical pump is used to reduce the time needed for 
A water aspirator or mechanical pump is used to reduce the time needed for the first step of this process in the "vacuum" type of this process. A Vigreux column is placed below the Y-adaptor in one type of the "fractional" type of this process. The "simple" type of this process heats a mixture of liquids, then condenses the resulting vapors. For 10 points, name this process of separating a mixture of liquids by boiling points.
A water aspirator or mechanical pump is used to reduce the time needed for the first step of this process in the "vacuum" type of this process.
{distillation}